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Theory of Machine

Theory of Machine
Relationship between the number of links (L) and number of pairs (P) is

P = 2L - 4
P = 2L + 2
P = 2L - 2
P = 2L + 4

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Theory of Machine
A typewriter mechanism has 7 numbers of binary joints, six links and none of higher pairs. The mechanism is

Not sound
Kinematically sound
Soundness would depend upon which link is kept fixed
Data is not sufficient to determine same

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Theory of Machine
A Porter governor is a

Pendulum type governor
Spring loaded governor
Dead weight governor
Inertia governor

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Theory of Machine
In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line of stroke PO and rotates with uniform angular velocity at ω rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral CQNO. The acceleration of the piston P with respect to the crank-pin C is given by

ω² × CN
ω² × QN
ω² × CO
ω² × NO

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Theory of Machine
Which of the following mechanism is an approximate straight line motion mechanism?

Watt's mechanism
All of these
Grasshopper mechanism
Robert's mechanism

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Theory of Machine
Which of the below are inversions of slider crank mechanism? 1. Oscillating cylinder engine mechanism 2. Toggle mechanism 3. Radial cylinder engine mechanism 4. Quick return mechanism

1, 2 and 3
1, 3 and 4
2, 3 and 4
1, 2 and 4

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